This natural (mineral UV filters only) broad spectrum sunscreen lotion uses SolaStay® S1 to mitigate the photocatalytic and reactive oxygen species generating activities of the oxides. It was subjected to in vitro analysis and delivered SPF ~54, PFA (PPD) ~18 performance with critical wavelength 378 nm. In vivo testing (three persons) yielded static SPF 57.9 in support of in vitro results.
Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
---|---|---|---|---|
A | Caprylic/Capric Triglyceride | 5.00 | Sunscreen Solvent | |
C12-15 Alkyl Benzoate | 5.00 | Sunscreen Solvent | ||
Tocopheryl Acetate | 0.30 | Antioxidant Agent | ||
Ethylhexyl Olivate | SENSOLENE® | 2.00 | Multifunctional Lipid | |
Ethylhexyl Methoxycrylene | SolaStay® S1* | 2.00 | Photostabilizer | |
Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Sunscreen Solvent / Emollient | |
B | Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) | 3.20 | UV Filter / Sunscreen Agent | |
Zinc Oxide [Zinc Oxide], Triethoxycaprylylsilane (30-200 nm primary particle size) | 8.00 | UV Filter / Sunscreen Agent | ||
C | Cetearyl Olivate, Sorbitan Olivate | OLIVEM® 1000 | 4.00 | Self-Emulsifier / Liquid Crystal Maker |
Cetyl Palmitate, Sorbitan Palmitate, Sorbitan Olivate | OLIWAX® LC | 1.00 | Emulsion Stabilizer | |
Methyl Methacrylate Crosspolymer | 2.00 | Film Former | ||
D | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
Disodium EDTA | 0.05 | Chelating Agent | ||
Xanthan Gum (pharma grade) | 0.25 | Thickener (Aqueous) | ||
E | Glycerin | 3.00 | Humectant | |
Preservative | a.n. | Preservative | ||
F | Cyclopentasiloxane | 3.00 | Volatile Carrier |
1 | To a secondary vessel add phase A, start mixing, add phase B, heat to 85°C and then add phase C. |
2 | To the main vessel add the Water of phase D, start mixing, add the other phase D ingredients in order, continue stirring phase D until fully incorporated and then start heating to 80°C. |
3 | When both phase ABC and phase D are homogeneous and at their designated temperatures, slowly add the oil phase ABC to the water phase D with mixing and then homogenize for 3 minutes and start cooling. |
4 | Add premix phase E when batch is below 50°C and then add phase F with mixing. |
5 | Continue mixing until batch is at room temperature, replacing any water lost to evaporation and mixing until smooth. |
Appearance | Off-white lotion |
Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s) | 3500 - 5000 |
pH | 6 - 8 |
*Patented and Patent Pending
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